<html>

<META HTTP-EQUIV="pragma" CONTENT="no-cache"> 
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate"> 
<META HTTP-EQUIV="expires" CONTENT="0">
<head>
	<title>清除缓存</title>
	<script type="text/javascript">
		
		var maxtime = 3; //一个小时，按秒计算，自己调整!   
        function CountDown() {
                if (maxtime >= 0) {
                    minutes = Math.floor(maxtime / 60);
                    seconds = Math.floor(maxtime % 60);
                    msg = "缓存清理中..." 
                    document.all["clrarCahceTag"].innerHTML = msg;
                    document.all["countDown"].innerHTML = "倒计时" + seconds + "秒, 将跳转到公众号";

                    --maxtime;
                } else{
                    clearInterval(timer);
					window.location.href = location.href + "?"+'time='+((new Date()).getTime());
				}
      }
      timer = setInterval("CountDown()", 1000);      
	</script>
</head>

	<body>
		<h1 id="clrarCahceTag">缓存清理中...</h1>
		<h2 id="countDown"></h2>
	</body>

</html>